Q: Brake Too Low of a force and pedal goes to the floor easy.

asked by on November 22, 2016

Hi, in My 2008 Mercedes Benz ML350 4 MATIC brake is very low. We have changed, new brakes, Rotors, Booster, Master Cylinder, Tested Check Valve and still same issue. What could be the issue ?. Bled brakes for any air several times as well. There is no leak in Brake Fluid anywhere.

My car has 145000 miles.
My car has an automatic transmission.

Brake pedal is spongy Inspection $94.99 - $114.99 Get a Quote

Hi there. Check the ABS (anti lock brakes) control module for any air in it. Sometimes when bleeding the brakes, the air will travel to locations within the brake system and get trapped. The module needs bleed with the brake system to relieve any air. If all of the air is out of the system, then it is possible that the brake module could be defective. If you need further assistance with having spongy brakes, then seek out a professional, such as one from Your Mechanic, to help you.

The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details

Get an instant quote for your car

Our certified mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Fair and transparent pricing


Experienced Mechanic?

Earn up to $70/hr

What others are asking

Gas filler door stuck, almost ran out of fuel
The fuel door on the Santa Fe has an electrical actuator to open the door and a back up release cable inside the vehicle near the door. The two main causes for the fuel door to not open are either...
How do I use the manual anti-glare feature on the rear view mirror?
The rear view mirror provides added visibility out of the rear window. However, when driving at night, the headlights from other vehicles can reflect off of your mirror with large amounts of glare, which can decrease your visibility. The rear...
Coolant light keeps coming on. 2009 BMW 335 xDrive
Hello. It sounds like there may be a coolant leak somewhere that is hard to find. It would be a good idea to have the coolant system pressurized and inspected for leaks. By adding pressure to the coolant system, it...
Alternator belt battery light
It sounds like your car alternator is not charging enough at lower speeds. Have the charging system checked to make sure your alternator is working or not and replace it if not charging enough. The bad battery may have caused...
Cutting off when coming to a stop
Unfortunately, without the make and model of your vehicle, this would be tough to diagnose. Generally, when the engine dies when coming to a stop, this is commonly related to what is known as an idle air control valve. The...
My car makes a loud screeching noise whenever I turn the ac on, it stops after a few seconds. Could this be a bad compressor?
Hi there: It is very possible that your AC compressor is the source of this type of noise. Much like other accessories driven by the engine’s belts, the AC compressor has several interior components and uses a sealed bearing to...
I have a 2004 Dodge Ram quad cab with a 5.7 liter 8 cylinder engine. When I put truck in 4 wheel drive and move I hear a clucking.
Hi there. The noise that you are hearing could be either the front axle engagement solenoid or the gear lash on the pinion and ring gear on the front axle could be too much. Check to see if the front...
Brake squeaking when releasing brake pedal
It could be that you have some debris from brake lining wear built up in the drums that is making the noise, if that's the case a simple brake shoe replacement (https://www.yourmechanic.com/services/brake-shoes-rear-replacement) will do the trick. It could also be...
why wont it go anywhere once it is warmed up?
It is not clear from your description if this is an engine loss of power issue or a transmission malfunction. Your vehicle might be going into limp mode once warmed up. Check for any OBD-II stored trouble codes that might...

Related articles

Top 10 Factors to Consider When Buying a Luxury Car
The The idea of owning a luxury car is appealing. The glossy paint, swoopy lines, and prestigious badges speak of the owner’s success in life, while the interior opulence offers scented leather surfaces, high-tech telematic devices, and all the creature-comfort...
A Buyer's Guide to the 2012 Mercedes-Benz GL-Class
In In the world of full-size SUVs, Mercedes-Benz has made a name for themselves by offering unrivaled luxury in a field where the size of the engine is often the most important metric. While the 2012 Mercedes-Benz GL Class definitely...
How to Buy a Good Quality Wheel Speed Sensor
For For vehicles that have anti-lock brakes, the wheel speed sensor plays an important role. They work together with the electronic stability control system that is found on so many vehicles today. This wheel speed sensor is responsible for keeping...